2145145 has 8 divisors (see below), whose sum is σ = 2725704. Its totient is φ = 1615104.

The previous prime is 2145137. The next prime is 2145151. The reversal of 2145145 is 5415412.

It can be written as a sum of positive squares in 4 ways, for example, as 712336 + 1432809 = 844^2 + 1197^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2145145 - 2³ = 2145137 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12534 + ... + 12703.

It is an arithmetic number, because the mean of its divisors is an integer number (340713).

2^2145145 is an apocalyptic number.

It is an amenable number.

2145145 is a deficient number, since it is larger than the sum of its proper divisors (580559).

2145145 is a wasteful number, since it uses less digits than its factorization.

2145145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25259.

The product of its digits is 800, while the sum is 22.

The square root of 2145145 is about 1464.6313529349. The cubic root of 2145145 is about 128.9690649536.

The spelling of 2145145 in words is "two million, one hundred forty-five thousand, one hundred forty-five".